Headlight-dimmer



P. H. LETCHFORD AND G H SAND/M13811.

HEADLIGHT DIMM'ER.

APPLICATION FILED FEB.5,1919.

LSWJ? 1 1 0 mm May m wow QM rnncr menace memes arm GEQRGE HENRY SALTMSH, OFWfNNIlEG, MAN} TUBA, CANADA.

' LIGH T-1Dl a, ER.

headgear;

Specification-or Letters Patent. Pmtpnpgfli 1% 19211 Applicationv riled February ti, 1919.. 7 Serial narrates.

. To all whom it may concern.

Be it knownthat we, 'Pnncr Homer lLn'roHrorn and GEORGE HENRY SAIITMARSH, both of the city of Winnipeg, in the Province of Manitoba, Canada, have jointly invent/ed certain new and usefullmprovements in Headlight-Dimmers, of which the following is the specification.

The invention relates to improvements in headlight dimmers and the principal object of the invention is to provide a dimmer for a headlight which, when applied, will provide a good driving light on the roadway but will not glare in the eyes of the pedestrian or other drivers.

A further object ofthe invention is to provide a dimmer which can be manufactured in a durable and inexpensivemanner and which can be readily installed in posi-. tion in the headlight and which, when installed, cannot rotate out of position.

A still further object is to construct a dimmer so that itcan be readily out down to fit the varying sizes of headlights now commercially sold.

With be above objects in view the invention consists essentially in'a mask plate and a reflector associated with the plate, the

parts being. arranged and constructed as hereinafter more particularly described and later pointed .outin the appended claims,

reference being had to the acconcipanying drawing in -which:-

lFigure 1 represents a vertical sectional merinstall I Fig. 2 represents a frontview of the dimmer. V

Fig. 8 represents a perspective view of the dimmer as it appears mounted in the glass rim and looking at it from the interior.

Fig. l represents a detailed horizontal sectional view through one of the spring clips or the rim.

in the drawing like characters of ref- .srenoe indicate corresponding parts in the several figures.

represents a mask plate provided cenaily with an upward extension 2 and at e edges with notches 3 and i. The mask e isutilized for cutting the direct the reflected rays m ght lamp and can gpaolue view through a headlight showing our dimof the headlight rimon which a is applied and the extension 2 is made such that when the dimmer is properly placed in the rim the extensioncovers the lamp from View.

- To the rear side of the mask plate we attach in any suitable manner a substantially U-shaped rearwardly extendingand downwardly inclining reflector 5 which is designed to extend beneath the light and practicallystouch the reflector of the headlight.

. In order that the invention may be better understood we have shown a headlight, now described, and the dimmer associated with it.

6 represents the reflecting surface of the headlight and 7 represents the rim carrying the usual glass 8 which glass is customarily held in position by a number of spring clips 9 mounted on the rim and holding the glass firmlyin place. 1, p

The dimmer isplaced in position by removing the rim with glassand placing the dimmer againstthe glass on the rear side and with the notches 3 and a receiving the clips as best shown in Fig. 3. This arrangement not only eldects the holding of the dimmer in place behind the glass but prevents the dimmer from rotatlng;

In referring to Fig. 1 it will be observed that the upper edge 10 of the extension lies slightly above the upper-side of the lamp 1l,the tip of the lamp being actually centered in respect to the extension, this being best .shown in Fig. 2\where the light is in dicated in dotted outline. Further, in these latter two figures it will be seen that the reflector 5 lies directly-underneath the lamp iind is for the greater part concentric to the amp.

When this device is in use there is a good driving light on the roadway and there is positively no glare.

By making the mask large enough to accommodate a large sized glass frame it is possible for one to out it down to it the smaller sizes as occasion may demand.

we claim asour invention is The combination with a headlight comprising a parabolic reflector, a lamp located at the point of the reflector and a closure lass i i-closing the i ront-oi the re fiector, a semi-sire st and covering t e low-er closure glass, said masked plalte being dis-' than the lamp and positioned directly'in front of the lamp and a substantially semi-l circular reflector carried by and inclining downwardly and extending inwardly. from the central part of the plate to a point adj acent the parabolic reflector and surrounding the under half of the lamp. a

2. The combination with a headlight comprising a casing, a closure glass closing the front of the casing, a rim and spring clips holding the glass in the rim, of a sem1-circu l'ar' masked plate adapted to fit against and cover the lower inside half of the headlight posed with its straight edge uppermost and having its curved edge notched adjacent to each end to receive 'the spring clips holding the closure glass in place, the upper straight edge of the masked plate being extended intermediate of its length to provide 'a projection disposed directly in front of the headligl'rt lamp bulb, and a reflector of subing the lower half of the lamp bulb so as to deflect upwardly the light rays emanating therefrom.

Signed at Winnipeg, this 15 day of J anuary 1919.

PERCY HORACE. LETCHFORD, GEORGE HENRY SALTMARSH. In the presence of v G. S. Roxeonerz,

K. B. WAKEFIELD. 

